Medhu vadai or ulundha vadai is a gluten-free savoury doughnut prepared using black lentils (urad dal). Any feast or festival in South India is incomplete without serving soft vadai with crispy golden skin. Nevertheless medhu vadai is a commonly prepared evening snack in our family particularly during monsoon.
Vadai are the most popular lentil patties prepared during Deepavali in South India. We prepare aama vadai using Bengal gram and ulundha vadai using black gram. We soak the left-over vadai in thayir (yogurt) and relish them as thayir vadai the next day.